______great time we had at the party last night！
| A．What | B．What a |
| C．How | D．How a |
--- Lily is ill in hospital .---Really ? I _____ know she was ill .
| A．don’t know | B．know | C．knew | D．didn’t know |
The task is so hard for
e . I don’t know _______________.
| A．what I can do | B．how to do | C．what to do | D．both A and C |
Good books help us ___________ a whole new world to me .
| A．turn up | B．look up | C．get up | D．open up |
There is no air _______ water on the moon .
| A．and | B．but | C．or | D．with |
They don’t know what ___________ the problem .
| A．to do | B．do | C．to do with | D．do with |